Not sure you are understanding how all of this needs to be wired.
The radio has to be connected to a reverse wire
the camera has to be connected to a reverse wire, 12+ & ground
The reverse wire on the radio is required for it to know when you are in reverse. On the camera is also for the same thing, but also to turn it on.
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2000 Boxster Tiptronic
2003 Boxster
2003 996 C2 Cab
2002 996 (SOLD)
1986 944 (gone but missed)
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